<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>Title</title>
  <style>
    a:hover{
      color: red;
      background-color: green;
    }
  </style>
</head>
<body>

<a href="#"></a>


<!-- 任何标签都可以添加伪类，都可以鼠标悬停 -->



</body>
</html>
